Available in 5 condensing models with outputs (@50/30°C) of 70, 95, 110, 140 and 180 kW.

Recently updated cast iron condensing, fully modulating, pre-mix gas fired commercial boiler.

Efficiency 96 product icon
Fuel NG product icon
Turndown 3 product icon
Warranty 10 heat exchanger product item
BIM objects icon
ErP Part L Compliant product icon
  • Proven reliability with a 10-year heat exchanger warranty
  • NEW built in boiler sequence controls capable of controlling up to 16 boiler modules and hot water circuits
  • Easy  access for servicing with NEW quick to remove front cover hooks 
  • NEW full spark ignitor enables servicing without the need to remove the whole burner
  • NEW Low NOx performance (<40mg/kWh, European Class 6)
  • Non complicated design means the Purewell Variheat mk2 is easy to operate & maintain, saving on time and money
  • Highly efficient offering up to 96% gross seasonal efficiency, reducing carbon emissions and saving the end user money on fuel bills
  • Fully factory tested before delivery
  • Sits on same footprint as many traditional and atmospheric boilers reducing space concerns
  • Easy access to plant room as the Purewell Variheat mk2 fits through a standard doorway
  • Can be supplied unassembled for plant rooms with difficult access
  • Tolerant of existing heating systems making the Purewell Variheat mk2 the perfect choice when replacing old atmospheric boilers
  • Suitable for use with LPG Air for installation in the Channel Islands
  • Buy in confidence from a UK manufacturer with decades of commercial heating and hot water expertise
  • Extensive back up and support from our team of experience engineers across the UK
  • The only cast iron condensing commercial boiler that is compliant with the Energy related Products Directive (ErP) available in the UK.
  Purewell Variheat mk2 boiler models Units PV70 PV95c PV110c PV140c PV180c
Energy Building regulations - seasonal efficiency (%) gross 95.3 95.6 95.8 95.7 94.6
ErP efficiency rating (modules ≤ 70 kW only)   A N/A N/A N/A N/A
Boiler output 80/60°C kW 63.5 86.3 99.8 134.4 172.8
Boiler output 50/30°C kW 70 95 110 140 180
Boiler input (gross) Maximum kW 72.2 98.4 115 151.3 194.6
Boiler input (net) Maximum kW 65 88.6 103.5 136.3 175.2
Boiler output Minimum 80/60°C kW 21.2 28.8 33.3 44.8 57.6
Boiler output Minimum 50/30°C kW 20.3 27.6 31.9 40.6 52.2
Water Water content litres 8 8 8 11 11
System design flow rate @ 20°C ∆T rise l/s 0.8 1.1 1.3 1.7 2.1
Water side pressure loss @ 20°C ∆T rise mbar 32 52 72 134 221
System design flow rate @ 11°C ∆T rise l/s 1.5 2.1 2.4 3 3.9
Water side pressure loss @ 11°C ∆T rise mbar 96 176 244 442 731
Maximum water pressure bar g 6 6 6 6 6
Gas Gas flow rate natural gas (G20) - maximum m3/hr 6.9 9.4 10.9 14.4 18.5
Nominal inlet pressure natural gas (G20) - maximum mbar 20 20 20 20 20
Maximum gas inlet pressure natural gas (G20) mbar 25 25 25 25 25
Flue Approx. flue gas volume @ 15°C, 9.5% CO2 @ N.T.P m3/hr 86 117 137 180 232
Approx. flue gas temperature @ 50/30°C °C 40 40 45 50 50
Approx. flue gas temperature @ 80/60°C °C 60 60 65 70 75
Pressure at boiler flue spigot @full load Pa 100 100 100 100 100
Dry NOx emission (0% excess oxygen, dry air free) European Class 6 mg/kWh 21.3 31.1 39.1 32 37.8
Connection Water flow/return connections inches R2” R2” R2” R2” R2”
Gas inlet connection pipe thread size inches R1” R1” R1” R1” R1”
Nominal flue diameter (I/D) mm 150 150 150 150 150
Electrics Electrical supply   230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz 230 V 1 Ph 50 Hz
Power consumption @maximum W 94 94 94 207 207
IEC power outlet power consumption @ maximum W 460 460 460 460 460
Start current and run current Amp 0.54 0.54 0.54 0.6 0.6
  Approx shipping weight kg 195 195 195 250 250
  Noise emission @1 m and @maximum boiler modulation Max dB (A) 53 53 53 65 65
  Title Type Size  
  • Easy fit replacement for refurbishment projects.
  • Medium sized commercial and public buildings including schools, care homes, hotels, churches and retail units.
  • Smaller commercial and public buildings including community schools, care homes, hotels, churches and retail units.
  • Locations with substantial and continuous heating load including hospitals, care homes and hotels.
  • Ideal replacement for atmospheric boilers.

Reverse return header kit available for:

  • 2 boiler installation
  • 3 boiler installation
  • 4 boiler installation ( 2 x 2 boiler installation kit)

Flues available through our flue partner Midtherm Engineering